<template>
    <div :class="className" :style="{ height: height, width: width }" />
</template>

<script>
import echarts from 'echarts';

require('echarts/theme/macarons'); // echarts theme
import { debounce } from '@/utils';

export default {
    props: {
        className: {
            type: String,
            default: 'chart',
        },
        width: {
            type: String,
            default: '100%',
        },
        height: {
            type: String,
            default: '300px',
        },
    },
    data() {
        return {
            chart: null,
        };
    },
    mounted() {
        this.initChart();
        this.__resizeHandler = debounce(() => {
            if (this.chart) {
                this.chart.resize();
            }
        }, 100);
        window.addEventListener('resize', this.__resizeHandler);
    },
    beforeDestroy() {
        if (!this.chart) {
            return;
        }
        window.removeEventListener('resize', this.__resizeHandler);
        this.chart.dispose();
        this.chart = null;
    },
    methods: {
        initChart() {
            this.chart = echarts.init(this.$el, 'macarons');

            this.chart.setOption({
                title: {
                    text: 'Graph 简单示例',
                },
                tooltip: {},
                animationDurationUpdate: 1500,
                animationEasingUpdate: 'quinticInOut',
                series: [
                    {
                        type: 'graph',
                        layout: 'none',
                        symbolSize: 50,
                        roam: true,
                        label: {
                            normal: {
                                show: true,
                            },
                        },
                        edgeSymbol: ['circle', 'arrow'],
                        edgeSymbolSize: [4, 10],
                        edgeLabel: {
                            normal: {
                                textStyle: {
                                    fontSize: 20,
                                },
                            },
                        },
                        data: [
                            {
                                name: '节点1',
                                x: 100,
                                y: 300,
                            },
                            {
                                name: '节点2',
                                x: 1000,
                                y: 300,
                            },
                            {
                                name: '节点3',
                                x: 550,
                                y: 100,
                            },
                            {
                                name: '节点4',
                                x: 550,
                                y: 500,
                            },
                        ],
                        // links: [],
                        links: [
                            {
                                source: 0,
                                target: 1,
                                symbolSize: [5, 20],
                                label: {
                                    normal: {
                                        show: true,
                                    },
                                },
                                lineStyle: {
                                    normal: {
                                        width: 5,
                                        curveness: 0.2,
                                    },
                                },
                            },
                            {
                                source: '节点2',
                                target: '节点1',
                                label: {
                                    normal: {
                                        show: true,
                                    },
                                },
                                lineStyle: {
                                    normal: { curveness: 0.2 },
                                },
                            },
                            {
                                source: '节点1',
                                target: '节点3',
                            },
                            {
                                source: '节点2',
                                target: '节点3',
                            },
                            {
                                source: '节点2',
                                target: '节点4',
                            },
                            {
                                source: '节点1',
                                target: '节点4',
                            },
                        ],
                        lineStyle: {
                            normal: {
                                opacity: 0.9,
                                width: 2,
                                curveness: 0,
                            },
                        },
                    },
                ],
            });
        },
    },
};
</script>
